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The P-side of lo N:P
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2018
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Endeavor
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Project Title: |
Development of low N:P in the euphotic zone - the P-side of the story |
Project Status: |
Submitted |
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Principal Investigator: |
Andrew R. Juhl, LDEO |
Project Institution: |
LDEO |
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Project ID: |
105690 |
Version #: |
1 |
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Date Submitted: |
2/14/2017 6:18:00 PM |
Created By: |
Andrew R. Juhl |
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Date Last Modified: |
6/28/2017 9:35:00 AM |
URI Serial #: |
None |
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Funding Agencies: |
NSF/OCE/CO - 1737240 - Funded |
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Summary of Field Work: |
We are requesting 17 (15 science days, 2 days in port MOB/DeMOB) days ship time each in summer 2018 and summer 2019. Departing and returning from a port on the Gulf of Mexico. We will study the temporal change in nitrogen and phosphorus nutrients as a water mass moves offshore.
We will identify the water mass we will study over the shelf/slope transition based on surface properties and track the water mass over the next 13 days by following a Argos-Apex float drifting at the surface that we will deploy within the water mass. We will deploy and recover floating PIT traps every 4 days (3x per cruise). Each day we will sample using a CTD/rosette, with bottles triggered at 6 depths between the surface and 150 m. At the end of the cruise we will recover the float.
Each day we will also be conducting experiments using radioactive tracers in deck incubators. |
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Summary of Facility Requirements: |
For a successful project we require full use of the ships available facilities including: CTD/rosette with 24 Niskin bottles, underway Temp/salinity/MET data, ADCP, flow through sea water (for on-deck incubators), sufficient deck space for three, flow-through incubators, compressed air, a 20' radioisotope van (with hook-ups) equipped with a scintillation counter, uncontaminated seawater for in- laboratory analyses, ultra pure deionized water, lab space inside for wet sample processing (filtration), a -20 freezer, a -80 freezer, and a chemical fume hood.
We request a res tech to help with the CTD, PIT trap, and ARGOS float deployments.
Our science party (and bunk needs) will be at least 11. We plan to bring as many as 5 collaborators, working on complementary projects, who would be willing to help with equipment deployment. |
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Summary of other requirements and comments: |
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Type of Request: |
Primary Ship Use |
Request Status: |
Submitted |
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Request ID: |
1009213 |
Created By: |
Andrew R. Juhl |
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Date Last Modified: |
2/14/2017 6:18:00 PM |
Date Submitted: |
2/14/2017 6:18:00 PM |
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Year: |
2018
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Ship/Facility: |
Endeavor
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Optimum Start Date:
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6/15/2018 |
Dates to Avoid: |
We are interested in the development of low nutrient conditions, and so summer conditions are imperative to achieve our objectives. |
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Earliest Start Date: |
6/1/2018 |
Multi-Ship Op: |
No |
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Latest Start Date: |
9/1/2018 |
Other Ship(s): |
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Operating Days Needed: |
Science Days |
Mob Days |
De-Mob Days |
Estimated Transit Days |
Total Days |
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15 |
1 |
1 |
0 |
17 |
Repeating Cruise?
(within same year) |
No |
Interval: |
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# of Cruises: |
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Description of Repeating cruise requirements: |
annual summer cruises 2017, 2018, but may be spaced out by more than 1 year in between |
Justification/Explanation for ship choice, dates,
conflicts, number of days & multi-ship operations: |
We are interested in the development of low nutrient conditions in the Gulf of Mexico, and so summer conditions are imperative to achieve our objectives. Our plan has a minimum requirement for 15 science days.
We require a ship with deck space for a 20' rad van. We also require deck space for on deck, flow-through incubators and space for deploying/recovering the CTD/rosette, floating PIT traps and an ARGOS- APEX float. |
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Short Description of Op Area
for use in schedules: |
N. Gulf Mexico |
| Description of Op Area: |
Louisiana continental shelf/slope, tracking a drifter |
| Op Area Size/Dia.: |
150 |
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Lat/Long |
Marsden Grid |
Navy Op Area |
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Beginning
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29.336° N
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88.958° W
map
29° 20.16' N
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88° 57.48' W
map
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Ending
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29.336° N
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88.958° W
map
29° 20.16' N
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88° 57.48' W
map
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Show Degrees Minutes |
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Foreign Clearance Required? |
No |
Coastal States:
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 Important Info on Foreign Research Clearances
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Are you or any member in your science party bringing in any science equipment items which are regulated for export by the International Traffic in Arms Regulations (ITAR) and/or the Export Administration Regulations (EAR)?
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No |
If yes, have you applied for the necessary permits through your export control office?
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No |
| Questions about ITAR/EAR regulations?
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Comments about foreign clearance requirements or
description of any other special permitting requirements
(e.g., MMPA, ESA, IHA, Marine Sanctuaries, etc.) |
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Requested Start Port |
Intermediate Port(s) |
Requested End Port |
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Gulfport, MS, USA |
None, |
Gulfport, MS, USA |
Explanation/justification for requested
ports and dates of intermediate stops
or to list additional port stops |
We have worked out of Gulfport MS previously and found it convenient, but if it is logistically more desirable for UNOLS, we are open to start and end the cruise in another port long the N. Gulf of Mexico (LA, MS, AL) |
Important Info on Working in Foreign Ports
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Chief Scientist: |
Ajit Subramaniam, LDEO |
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# in Science Party |
11 |
# of different science teams |
1 |
# Marine Technicians to be
provided by ship operator:
(include in science party total)
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1 |
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Explanation of Science Party Requirements and Technician Requirements |
Science party includes chief scientist, 3 additional PIs, a technician, 1 graduate students, a high school teacher, and 3 undergraduate students. It also includes a sea technician, requested to help operate the CTD and
facilitate deck operations, esp. deployment and recovery of the floating PIT traps, and ARGOS float |
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 Dynamic Positioning |  ADCP | Multibeam | Seismic |
| Dredging/Coring/Large Dia. Trawl Wire | Stern A-frame | Fiber Optic (.681) | 0.680 Coax Wire |
| SCUBA Diving | Radioisotope use - briefly describe | NO Radioisotope use/Natural level work | Other Operator Provided Inst. - Describe |
| 0 PI-Provided Vans - briefly describe | MOCNESS | | |
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Explain Instrumentation or Capability
requirements that could affect choice
of ship in scheduling. |
Our project includes measurements of phosphorus uptake and excretion rates by marine microorganisms that need to be addressed using incubations with radioisotopes (P33). This is a sort-lived isotope and we need an onboard scintillation counter in the rad van.
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Explain Major Ancillary Facilities
Requirements and list description
and provider for "other" systems. |
A Radioisotope Lab Van equipped with a liquid scintillation counter is requested to manipulate 33P radioisotopes for on-deck uptake/excretion rate measurements. |
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